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The lens in the adult human eye blocks nearly 100 percent of the sun's UV rays. As part of the normal aging process, the eye's natural lens eventually blocks some short-wavelength blue light as well â the type of blue light most likely to cause damage to the retina and lead to macular degeneration and vision loss.
The most powerful electromagnetic radiation that reaches the retina is blue light. Blue light waves are 400 â 500 nm in wave length and are (obviously) recognized by our eye as the color blue. So when you see the blue ocean and the blue sky, you are getting hammered by blue light.